https://scholars.lib.ntu.edu.tw/handle/123456789/503240
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lin, Y.-G. | en_US |
dc.contributor.author | Hsu, Y.-K. | en_US |
dc.contributor.author | Basilio, A.M. | en_US |
dc.contributor.author | Chen, Y.-T. | en_US |
dc.contributor.author | Chen, K.-H. | en_US |
dc.contributor.author | YIT-TSONG CHEN | en_US |
dc.creator | Chen, L.-C.;Chen, K.-H.;Chen, Y.-T.;Basilio, A.M.;Hsu, Y.-K.;Lin, Y.-G. | - |
dc.date.accessioned | 2020-06-18T06:09:57Z | - |
dc.date.available | 2020-06-18T06:09:57Z | - |
dc.date.issued | 2014 | - |
dc.identifier.issn | 10944087 | - |
dc.identifier.uri | https://scholars.lib.ntu.edu.tw/handle/123456789/503240 | - |
dc.description.abstract | Hydrogen generation through direct photoelectrolysis of water was studied using photoelectrochemical cells made of different facets of free-standing polar GaN system. To build the fundamental understanding at the differences of surface photochemistry afforded by the GaN {0001} and {000 -1} polar surfaces, we correlated the relationship between the surface structure and photoelectrochemical performance on the different polar facets. The photoelectrochemical measurements clearly revealed that the Ga-polar surface had a more negative onset potential relative to the N-polar surface due to the much negative flat-band potential. At more positive applied voltages, however, the N-polar surface yielded much higher photocurrent with conversion efficiency of 0.61% compared to that of 0.55% by using the Ga-polar surface. The reason could be attributed to the variation in the band structure of the different polar facets via Mott- Schottky analyses. Based on this work, understanding the facet effect on photoelectrochemical activity can provide a blueprint for the design of materials in solar hydrogen applications. © 2013 Optical Society of America. | - |
dc.publisher | Optical Society of American (OSA) | - |
dc.relation.ispartof | Optics Express | - |
dc.subject.classification | [SDGs]SDG7 | - |
dc.subject.other | Energy conversion; Gallium nitride; Hydrogen production; Solar power generation; Surface structure; Flat-band potentials; Hydrogen generations; Photoelectrochemical measurements; Photoelectrochemical performance; Photoelectrochemicals; Photoelectrolysis; Schottky analysis; Surface photochemistry; Applied voltages; Electrochemistry | - |
dc.title | Photoelectrochemical activity on Ga-polar and N-polar GaN surfaces for energy conversion | en_US |
dc.type | journal article | en |
dc.identifier.doi | 10.1364/OE.22.000A21 | - |
dc.relation.pages | A21-A27 | - |
dc.relation.journalvolume | 22 | - |
dc.relation.journalissue | S1 | - |
item.openairecristype | http://purl.org/coar/resource_type/c_6501 | - |
item.fulltext | no fulltext | - |
item.openairetype | journal article | - |
item.grantfulltext | none | - |
item.cerifentitytype | Publications | - |
crisitem.author.dept | Chemistry | - |
crisitem.author.orcid | 0000-0002-6204-8320 | - |
crisitem.author.parentorg | College of Science | - |
Appears in Collections: | 凝態科學研究中心 |
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